Slow-starting wiredrawing block



Feb. 5 1924. 1,482,861 c. H. OSLUND SLOW STARTING WIRE DRAWING BLOCK Filed May 22. 1922 FL ZTLIUY CXuan'bcds H Oshawa Patented Feb. 5, 1924. 4

teaser learner caries.

CHARLES H. OSLUND, OF WORCESTER, IMASSAGHUSETTS, ASSIGNOB TO THE 0 & J

MACHINE COMPANY, A COREORATION OF MASSACHUSETTS.

SLOW-STARTING WIREDR-AWI NG BLOCK.

Application filed May 22,

T0 aZZ whom it may concern:

Be it known that I, CHARLES H. OsLUND, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Slow-Starting VViredrawing Block, of which the following is a specification.

This invention relates to a drum for a wire drawing machine or bench. It can be applied either to the drawing through drums or to the winding drum.

The principal object of the invention is to provide a device by which the drums of a wire drawing machine or bench, can be started up slowly by hand after the wire is inserted through the die. Other objects of the invention are to provide arrangements of this character in which the drum is positively connected with the driving means normally, and will be automatically disconnected therefrom when the hand operating means is applied and automatically reconnected when the hand operating means is moved out of operative position; to provide an operating means for turning the drum by hand, preferably in the form of a hand wheel, which will be of very convenient form for use in starting the drum, to provide these parts in such simple manner that they will be'ineXpensive and involve very little, if any, increase'in expense for repairs. Further objects and advantages of the invention will appear hereinafter.

Reference is to be had' to the accompany ing drawings, in which Fig. 1 is a plan of a first wire drawing, drum constructed in accordance with this invention;

Fig. 2 is a central sectional view of thesame; and

Fig. 3 18 a fragmentary plan in another position.

It is well known that when a wire is passed through a die and i then applied to the drum on which it is to be wound, or by which it is to be drawn, it is at first in a slack condition. When the drum, starts, it at first merely takes up the slack and then, usually at full speed or at a comparatively high speed, it suddenly commences to draw the wire through the die. The wire has to be flattened and reduced in size to thread it through the die and that is done unevenly by hand. Therefore, breakage is a common 1922. Serial No. 562,602.

result. Even when a slow'starting device is employed, it is mechanically positive and will not yield to sudden increases in diameter of the wire or other variations in its size and hardness.

This difiiculty, I am aware, has been well known for many year and many attempts have been made to overcome it. I overcome it by a hand operating device. This procedure involves the entire disconnection of the positive driving means from the drum instantaneously when the hand driving device is placed in position for operation. It also involves the instantaneous connection of the positive driving means with the drum when the hand operating means is withdrawn, and it eliminates the necessity for starting up the mechanical driving device slowly. The operator can start the drum by hand as slowly as desired and in a very convenient winding drum, although I have shown only one.

I have illustrated the invention in Figs. 1, 2 and 3 as applied'to the first drawing through drum 10. This is provided with a hub 11 in which is centered, but freely rotatable, a positive driving shaft 12 shown in vertical position, and projecting up from below. This shaft may be driven in any desired way and preferably is driven positively and at constant speed. The top of this shaft is squared ed at 13 or otherwise given a non-circular shape. Fitting it so as to run with it positively is a hub 14: having thereon a positive power transmitting member or wheel, shown in the form of an external gear 15. This gear, therefore, rotate positively with the shaft 12, while the drum 10 is capable of rotating with it or otherwise.

At the top of the hub 1a is a circular shoulder 19 having a flat upper surface. On this rests a plate 16 which has a circular perforation for the top of the hub and extends out from the center radially in a horizontal direction. At its outer end this plate has a vertical bearing 18 for a shaft 27. The bearing 18 is secured to the inside of the drum 10 by screws as 17 or the like. The plate 16 thus rotates with the drum and carries with it the shaft 27. On the bottom of the shaft 27 is a pinion 20 and on the top a similar pinion 21. Both of these pinions are keyed to the shaft. The pinion 20 constantly meshes with the gear 15.

The pinion 21 meshes with a gear 22 mounted to rotate freely on a vertical shaft 23, having a bearing 24 in the plate 16.

The shaft 12 ha extending up from its square end a central projection 30 of cylindrical form. On this is adapted to fit a sleeve 31 having a pinion 82 at the bottom for meshing with the gear 22. I have shown this sleeve as surrounded by a hub 33 at the top provided above with a. hand wheel 45 rotatable freely. The sleeve and hub are pinned or otherwise secured together. This hand wheel is concentric with the drum and of a little longer diameter. A handle 46 keyed on a shaft 4 1 journalled on the hand wheel has on the bottom a cam 48 for engagement with the end of a pawl 42. This pawl is held by a spring 11 in engagement with the teeth of an internal rack $0 on the drum.

I have shown the drum as provided with a hole 36 through which the wire is attached in any desired way.

The operation of the device is as follows: Normally the parts are in the position shown in Fig. 3 and the hand wheel 45, sleeve 31, and pinion 32 are rotated by the gearing 15, 20, 21, 22 and 32 in a direction contrary to that of the shaft 12 when the drum is not moving. The shaft 12 rotates the gear 15 with it, and as the shaft 27 cannot rotate on the axis of the drum, it necessarily rotates on its own axis. This causes the hand wheel 45 to rotate with the shaft 12 but oppositely.

In the starting of the machine as explained above, it is not desirable to start at full speed. Forthat purpose the operator places the pawl 12 in the position shown in Fig. 3. While the shaft 12 and also the gear 15 are rotating at full speed, there is no positive connection to the drum although it is free to rotate on its own axis. Consequently the rotation of the gear 15 will rotate the shaft 27 through the pinion 20 without mov ing the shaft bodily and without moving the drum. This rotates the pinion 21 and gear 22. It likewise rotates the pinion 32 and hand wheel, but the drum remains stationary. Now in order to turn the drum, the operator retards the hand wheel 45 and applies the power through the gears in the reverse order to that just above described. In this way he can cause the shaft 27 to turn on its own axis at a different speed from that at which it would rotate normally from 12, and he can cause the pinion 20 to walk around the rotating gear 15 at any desired speed. This will cause the drum 10 to rotate slowly in a forward direction. This is done while the slack wire is being taken up. Now in order to speed up the drum he ro tates it faster by slowing up the hand wheel until it is going so slowly that the drum rotates at the same speed as the gear 15 or nearly so. In other words, he holds back the hand wheel hard enough to prevent the ro tation of the pinions 20 and 21 on their own axes. Then he simply turns the handle 46 to the position shown in Fig. 1. This positively stops the rotation of the shaft 27 on its own axis, thus forcing the drum 10 to rotate positively with the driving shaft 12.

In my copending applications, Serial No. 477,814, filed June 15, 1921, and Serial No. 562,601, filed May 22, 1922, l have shown certain stringing up devices for wire draw- 'ing machines having some mechanism in common with part of that shown herein. It is to be understood that this is not a stringing up device but a slow starting device. Therefore I have not claimed herein any mechanism shown and claimed in said co pending applications except in combination with features not shown therein.

Although I have illustrated and described only one form of the invention and shown them as applied to one drum of a wire drawing machine, I am aware of the fact that the construction can be further modified and the device applied to other types of winding and wire drawing drums without departing from the scope of the invention as expressed in the claims.

Therefore, I do not wish to be limited to all the details of construction or to the particular kinds of drums herein shown and described, but what I do claim is:

1. The combination with a wire drawing drum, of a shaft on which the drum is centered, the shaft and drum being relatively rotatable, a positive power transmitting member fixed with respect to said shaft, a hand wheel, means carried by the hand wheel for transmitting the motion of said member to the drum positively, said means being movable to inoperative position, the hand wheel being connected for positively rotating the drum when the first named means is in inoperative condition, and means for rendering the hand wheel inoperative.

2. In a wire drawing machine or bench, the combination with a drum for receiving wire on its surface, of a driving shaft on which the drum is centered and relatively rotatable, a toothed wheel fixed to the shaft, a shaft parallel with the driving shaft, means on the second shaft for connecting the toothed wheel with the drum to drive the drum positively therefrom, said drum having teeth thereon concentric with the driving shaft, a movable pawl adapted to engage with said teeth, and a hand wheel carrying said pawl.

3. In a wire drawing machine or bench, the combination with a drum for receiving wire on its surface, of a shaft on which the drum is centered but with respect to which the drum is rotatable, a gear fixed to said shaft within the drum, a shaft mounted in place on the drum inside it, a pinion on said shaft meshing with said gear, means for preventing the last named shaft from rotating on its own axis, whereby the drum will be forced to rotate with the driving shaft positively, a hand wheel mounted on the upper end of said driving shaft, and means connected with said hand wheel for releasing the second shaft and permitting it to rotate on it own axis and for rotating it on its own axis from the hand wheel.

4. In a wire drawing machine or bench, the combination with a driving shaft, of a gear fixed thereto to rotate positively with the shaft, a drum centered on and loosely connected with the driving shaft, and means connected with said gear for positively driving the drum with it at its own speed, said means comprising a shaft carried by the drum, located on an axis parallel with the axis of the driving shaft, two pinions on the parallel shaft and positively connected therewith, one meshing with said gear, a gear meshing with the other pinion and mounted to turn on an axis rotatable with the drum and adapted to rotate the second shaft, a hand wheel having means for connecting it positively with the drum and disconnecting it therefrom, and a pinion fixed to the hand wheel and meshing with the last named gear and constituting means for independently rotating the second shaft to impart its rotation through the second shaft to the drum.

5. The combinaion with a rotary drum, of a relatively rotatable power shaft, means for positively connecting the drum with the shaft for driving the drum, said means being adapted to be disconnected, a hand operated wheel rotatable with the drum when the drum is connected with the shaft and connected with the shaft to be rotated thereby in the opposite direction when the drum is not positively connected with the shaft, and means whereby when the rotating hand wheel is slowed down the drum will be caused to start to rotate forwardly.

In testimony whereof I have hereunto afiixed my signature.

CHARLES H. OSLUND. 

